Arm for radial drills.



No. 883,118. I PATENTED MAR. 24, 1908.

' H. MOG. NORRIS.

ARM FOR RADIAL DRILLS.

APPLICATION FILED 00T. 29,1907.

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UNITED sTATEs PATENT oEEioE.

. HENRY MCCOY NORRIS, OF CINCINNATI, OHIO, ASSIGNOR TO 'lI-IE BICKFORD DRILL & TOOL COMPANY, OF CINCINNATI, OHIO, A CORPORATION.

ARM FOR RADIAL DRILLS.

T 0 all whom it may concern:

Be it known that I, HENRY MoCoY NoR- Ers, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Arms for Radial Drills, of which the following is a specification.

My invention relates to an improvement in an arm of a radial drill.

rIhe object of my invention is to provide an improved structure of arm for radial drills which will greatly increase its strength and rigidity, and which will provide greater bearing surface against which the headstock can be locked.

The features of my invention are more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which:--

Figure 1 is a front elevation of my improved arm for radial drills. Fig. 2 is an enlarged section on line :t-x, Fig. 1. Fig. 3 is an enlarged section on line w, Fig. 1. Fig. 4 is a perspective view of the rear portion of the arm showing the head-stock and transmission elements in position.

As shown, the arm is constructed for use ,on what is termed a half universal radial ient position regarding compactness and neatness of design.

1 represents the sleeve from which the tubular sections 2, 3, project. Said sleeve is split in the usual manner and Jfits the column 4, to which it is clamped in the usual manner. The column carries the main driving Specification of Letters Patent.

Application filed. October 2,9, 1907.

Patented March 24, 1908.

Serial No. 399,750.

shaft 5 and the screw feed shaft 6 in the usual manner. The arms 2, 3, terminate at the outer end in a connecting tube 7, formed integral therewith. The forward or front face of each tube section of the arm is provided with gib-ways 8, 9, upon which the headstock 10 is slidably mounted. The inner opposing faces of the tube sections 2, 3, are provided with the ways 11 forming clamping surfaces between and against which the head-stock 10 is clamped in its adjusted position.

12 represents a rack formed on the gibway 8 for feeding the head-stock 10.

13 represents a shaft journaled in the arm and between the tube-sections 2, 3.

14 represents a casing mounted between the tubular sections 2, 3, Within which is journaled a system of variable speed gearing for imparting a varying speed drive to the drill spindle.

By constructing an arm, as above described, it is capable of withstanding a greater drilling strain without flexing than is possible with the arms as heretofore constructed, and further it is also possible to more securely lock the head-stock in position. This enables the drill to be fed more rapidly into the work in making heavier cuts, and insures greater precision in action;

Having described my invention, I claim:-

An arm for radial drills, comprising two tubular sections parallel with each other, integrally connected at each end, a head-stock gibbed to saidtubular sections, and having a bearing projection extended between said tubular sections, and ways formed on the inner opposing faces of the tube sections, providing rigid abutments between and against which the head may be clamped, substantially as described.

In testimony whereof I have hereunto set my hand.

HENRY MoCOY NORRIS.

Witnesses:

OLIVER B. KAISER, LEO ODONNELL. 

